Dual-frequency MEMS oscillator — what the ratings mean for your clock tree
The DSC6121CI2A-00ES: That dual-frequency capability means one device can feed, say, a 48 MHz USB PHY and a 50 MHz Ethernet MAC without a second oscillator or a PLL multiplier on the board. Current draw is 3 mA typical per output — combined, the two active outputs pull about 6 mA from the supply. That low consumption makes this oscillator a fit for power-sensitive designs where a can-style quartz oscillator would burn twice the budget.
Obsolete — sourcing reality for the DSC6121CI2A-00ES
That means the manufacturer no longer produces this exact order code — no last-time-buy window remains open, and no official successor part number has been assigned. For BOM lines that still call out this oscillator, supply runs through independent distribution and surplus channels.